285660318784 has 21 divisors (see below), whose sum is σ = 566865679957. Its totient is φ = 142828021504.

The previous prime is 285660318719. The next prime is 285660318787. The reversal of 285660318784 is 487813066582.

It is a happy number.

The square root of 285660318784 is 534472.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 15593016384 + 270067302400 = 124872^2 + 519680^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285660318787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4242372 + ... + 4309180.

Almost surely, 2^285660318784 is an apocalyptic number.

285660318784 is the 534472-nd square number.

It is an amenable number.

285660318784 is a deficient number, since it is larger than the sum of its proper divisors (281205361173).

285660318784 is an frugal number, since it uses more digits than its factorization.

285660318784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133630 (or 66811 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 58.

The spelling of 285660318784 in words is "two hundred eighty-five billion, six hundred sixty million, three hundred eighteen thousand, seven hundred eighty-four".